From the World Wide Web :
"HAMPTON, Ga. – Atlanta Motor Speedway, a track that has dealt with weather issues often, faces another sour forecast for Sunday’s Folds of Honor QuikTrip 500 Monster Energy NASCAR Cup Series race.
Sunday’s forecast calls for an 80% chance of rain and possible thunderstorms. The possibility of rain increases to 90% in the evening hours.
The rain is predicted to start mid-morning.
NASCAR is considering moving the race’s scheduled start time from 2 p.m. (ET) to 1 p.m., a decision that would have to be made no more than 24 hours in advance because of television considerations.
If the race is postponed Sunday, it would be rescheduled Monday. Monday’s forecast calls for morning showers, but sunshine is predicted for the afternoon."...! and Not So ...!